题目

She was so angry at ________ he was doing ________ she stayed up all night. A . that; that B . that; which C . what; that D . what; as 答案：C许多重点中学从国外聘请外教求学校教授外语，这种语言传播过程属于 [　　] A．传染扩散　　　B．迁移扩散 C．刺激扩散　　　D．等级扩散